Supramolecular self-assemble of mixed f-d metal ion conjugates
Date
2006
Authors
Katell, S.D.
Leonard, J.P.
Plush, S.E.
Gunnlaugsson, T.
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Organic Letters, 2006; 8(13):2727-2730
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[reaction: see text] The synthesis of the novel Eu(III) cyclen complex, Eu1, is described. In buffered pH 7.4 water, the Eu(III) emission was "switched on" upon excitation of the Terpy antenna. In the presence of various transition-metal ions (e.g., Fe(II) and Ni(II)), both the singlet-excited state and the Eu(III) emission were quenched ("switched off"), whereas in the ground state, an MLCT band was formed, signifying the formation of stable mixed linear trimetallic f-d supramolecular self-assemblies.
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